Guide for straightedges



July 1927' R. c. WILLIAMS GUIDE FOR STRAIGHTEDGES Filed Oct.

Patented July 12,v 1927.

outrun STATES;

PATENT orries ROBERT c. WILLIAMS, on SAN FRANCISCO, CALIFORNIA.

Gums son STRAIGHTEDGES.

Application filed October 19,1925. Serial No. 63,483.

The invention relates to improvements in an adjustable guide to be attached to a straight-edge used for cutting, ruling or trimming paper, cloth or other material at 5' an even distance from the'border or edge; and the objects ofthe improvement are, first, to provide. an adjustable guide which may be easily attached to each end ot' 'a. straightedge; second, to afford facilities for quickly adjusting the guide to a definite measurement or position; third, to quickly deter mine by the guide, an accurate position for each end of a straight-edge.

One form of the invention is illustrated in the accompanying drawing in which Fig. 1 is a plan or top View; Fig. 2 is a section on line A A, Fig. 1; and Fig. 3 is a section on line B B, Fig. 1. r s

The body or main member 1, with the arms 2 and 3. at right angles constitute the framework for the guide and is held in position on a straight edge by engaging the straight-edge 7 with arm 3, and set screw 10. The top or'face ot' the main member-1 confor the purpose of guiding aslidingscale 6, which is graduated in cooperation with 111- dex mark 14, and is locked in position by set screw 11.

in direct plane with the lower surface of the straight-edge 7, is at right angles to the sliding scale 6, and is integral through" the connecting arln l, and is for the purpose of determining the positionor location for the straight-edge-T, 'as related to the border or outer edge of the paper or material to'be cut or ruled. V

. The' notches 8, in the guide-arm 9, are 40 without changing the position of the sliding scale 6. c j Y I tains two grooves 5 running longitudinally The guide arm 9, which is parallel to and for making small adjustments or allowances A-slot 13, running lengthwise, partway oisliding scale 6, permitsit to move back and I tort-h past the set screw 11. The sliding i scale 6 is marked on in inches and fractions thereof for accuratelyadjusting um guidearm 9 to the same measurement at each end of the straight edge; or to a different measurement, it necessary, as in the case of t-rimming wall paper.

In the use-of a straight-edge, which has no attachment or means for determining a fixed position to cut, rule or trim a quantity of paper or other material at the sameeven distance from the outer edge of said paper or material or according to an" irregular border, it is difficult to .quickly adjustthe,

ing drawings.

'Iclaim: The combination, in a guide for a straight edge, of an enlongated clamp'havin'gan arm at each end, with'a set screwv through one arm to engage one edge of said straight- 1-- edge, and having two rooves running lengthwise to receive an ad ustable scale, a scale havmga gulde arm at one end, mount ed in said grooves and by which the 'position of thestraight-edge is determined, a I set screw for holdingsaid scale'in a fixed position onlsald clamp.

ROB RT OQwIL IA s; 

